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Mohammad Reza Ahmadi Zand

Publications and source records attributed to Mohammad Reza Ahmadi Zand.

5 recordsLinked to original sources
arXiv2025

A Lyapunov-Based Distri buted Framework for Complete and Phase Synchronization in Chaotic Multi-Agent Systems

This paper presents a distributed Lyapunov-based control framework for achieving both complete and phase synchronization in a class of leader-follower multi-agent systems composed of identical chaotic agents. The proposed approach introduces a novel nonlinear coupling mechanism and utilizes Lyapunov stability theory combined with matrix measure analysis to derive explicit synchronization conditions. In contrast to traditional LMI-based or adaptive methods, the present approach guarantees synchronization under limited topological information and reduced computational complexity. Three classical chaotic systems - Roessler, Lu, and Chen - are used to validate the theoretical results, confirming the superior convergence rate and robustness of the proposed scheme.

math.DS↗
arXiv2025

On Slender Generalized Groups

This paper introduces the concept of slender generalized groups, extending the classical notion of slender abelian groups to the setting of generalized groups (completely simple semigroups). We establish fundamental properties of slender generalized groups and prove that, in the abelian case, the classical and generalized definitions of slenderness coincide. Several structural results are provided, including the behavior of slenderness under homomorphisms and subgroups. We also present examples and non-examples to illustrate the theory. Our results demonstrate that slenderness is preserved under taking generalized subgroups and that the group components $G_{e(a)}$ of a slender generalized group are slender in the classical sense.

math.GR↗
arXiv2021

Common properties of some function rings on a topological space

For a nonempty topological space X, the ring of all real-valued functions on $X$ with pointwise addition and multiplication is denoted by $F(X)$ and continuous members of $F(X)$ is denoted by $C(X)$. Let $A(X)$ be a subring of $F(X)$ and $B$ be a non-zero and nonempty subset of $A(X)$. Then we show that there are a subset $S$ of $X$ and a ring homomorphism $ϕ:A(X)\to A(S)$ such that $ker ϕ=Ann(B)$. A lattice ordered subring $A(X)$ of $F(X)$ is called $P$-convex if every prime ideal of $A(X)$ is an absolutely convex ideal in $A(X)$. Some properties of $P$-convex subrings of $F(X)$ are investigated. We show that the ring of Baire one functions on $X$ is $P$-convex. A proper ideal $I$ in $A(X)$ is called a pseudofixed ideal if $\bigcap \overline{Z[I]}\neq \emptyset $, where $ \overline{Z[I]}=\{cl_X f^{-1}(0) | f\in I\}$. Some characterizations of pseudofixed ideals in some subrings of $F(X)$ are given. Let $X$ be a completely regular Hausdorff space and let $A(X)$ be a subring of $F(X)$ such that $f \in A(X)$ is a unit of $A(X) $ if and only if $f^{-1}(0)=\emptyset$ and $C(X) \subseteq F(X)$. Then we show that $A(X)$ is a Gelfand ring and $X$ is compact if and only if every proper ideal of $A(X)$ is pseudofixed.

math.GN↗